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10501 Maximum Distributed Tree constructive algorithms dfs and similar greedy math number theory sortings trees Statement D Codeforces Round 665 (Div. 2) {1401} PROGRAMMING 1750.0 Codeforces Round #665 (Div. 2) Editorial
12482 Divine Tree constructive algorithms greedy math sortings trees Statement C Codeforces Round 1033 (Div. 2) and CodeNite 2025 {2120} PROGRAMMING 1250.0 Codeforces Round 1033 (Div. 2) and CodeNite 2025 Editorial